WO2016004556A1

WO2016004556A1 - Service flow processing method, apparatus and device

Info

Publication number: WO2016004556A1
Application number: PCT/CN2014/080060
Authority: WO
Inventors: 魏鑫鹏
Original assignee: 华为技术有限公司
Priority date: 2014-06-17
Filing date: 2014-06-17
Publication date: 2016-01-14
Also published as: CN105379218B; US10581700B2; EP3148149A4; US20170099194A1; EP3148149A1; CN105379218A; JP2017518710A

Abstract

Embodiments of the present invention provide a service flow processing method, apparatus and device. In the embodiments of the present invention, SFs are classified, and specific instances are not selected for stateless SFs, and therefore the number of SFPs and the number of SFP IDs used for uniquely identifying the SFPs can be effectively reduced, and signaling overheads required when a controller configures SFPs for the SFFs are reduced, and further, storage space for storing the configuration information by the SFFs is saved.

Description

业务流的处理方法、装置及设备 Service flow processing method, device and device

技术领域 Technical field

本发明实施例涉及通信技术，尤其涉及一种业务流的处理方法、装置及设备。背景技术 The embodiments of the present invention relate to communication technologies, and in particular, to a method, device, and device for processing a service flow. Background technique

运营商网络中通常会部署各种能够对网络业务流进行处理的网络业务功能（Service Function, 简称 SF) ，例如 TCP加速器、防火墙、视频加速器等，这些 SF被运营商部署在网络中固定位置（静态的部署在网络拓扑中的某个位置），当网络业务流流经网络时会根据运营商配置而依次经过网络中的 SF。采用上述静态的方式进行部署网络中各个 SF时，当 SF 部署完成后，其所在的网络位置就不会发生改变，这样会导致所有的网络业务流无论需要进行何种处理均需要一次性经过网络中所有的 SF, 并且其处理顺序唯一，无法满足网络业务流需要经过不同顺序 SF的功能，针对上述问题，网络标准化组织提出了业务功能链（Service Function Chain, 简称 SFC) 的概念。 The service network (Service Function, SF for short), such as TCP accelerators, firewalls, and video accelerators, is deployed in the carrier network. These SFs are deployed by operators in fixed locations on the network. Statically deployed in a certain location in the network topology. When the network traffic flows through the network, it will pass through the SFs in the network according to the carrier configuration. When the SF is deployed in the static mode, the network location of the SF will not change after the SF is deployed. This will cause all network traffic to be processed through the network at any time. All the SFs, and their processing order is unique, can not meet the needs of the network service flow through different order SF. In response to the above problems, the network standardization organization proposed the concept of Service Function Chain (SFC).

现有网络实现 SFC功能的架构中，主要的功能实体包括： SFC控制器 ( SFC Control ler ) ，各种 SF实例 sf (即 SF的一个具体实例，例如一个具体的防火墙设备 sf l ) ，分类器（Classif ier ) ，业务转发设备以及底层网络转发设备（例如层三路由器、层二交换机）。当 SFC Control ler 接收到业务链服务请求消息（service chain request ) 之后，如果存在一个 SFC的具体实例 SFP可以使用，并且该 SFP包括了提供 SFC功能的具体的各个 sf，且各 sf 负载低，则 SFC Control ler选择该 SFP为请求的网络业务流提供网络服务，此时 SFC Control ler需要将请求消息中的匹配规则（match rule ) 添加到分类器中 SFP ID所对应的匹配规则中， SFC Control ler 也可以根据业务链请求消息中所请求的 SF来选取相应的 SF 实例，然后生成新的 SFP并为其分配一个新的 SFP ID , 在选取 SF实例的过程中，如果同一个 SF存在多个可用实例，则 SFC Control ler 从多个 SF实例中选择负载低的 SF实例。 In the architecture of the existing network to implement the SFC function, the main functional entities include: SFC controller (SFC Controller), various SF instances sf (ie, a specific instance of SF, such as a specific firewall device sf l), classifier (Classif ier), service forwarding device and underlying network forwarding device (such as layer three router, layer two switch). After the SFC Controller receives the service chain request message, if there is a specific instance SFP of the SFC, and the SFP includes the specific sfs that provide the SFC function, and the sf load is low, then The SFC Control Manager selects the SFP to provide network services for the requested network service flow. The SFC Control Manager needs to add the match rule in the request message to the matching rule corresponding to the SFP ID in the classifier. SFC Control ler The SF instance may be selected according to the SF requested in the service chain request message, and then a new SFP is generated and assigned a new SFP ID. In the process of selecting the SF instance, if multiple SFs exist, the same SF exists. Instance, then SFC Control ler from multiple Select the SF instance with low load in the SF instance.

由于在实际的网络部署中，可能会为一个 SF部署多个具体的实例 sf，按照现有的技术方案，为实现负载均衡， SFC Control ler会选择某个 SF 所对应的任何一个 sf，若存在大量的 sf 则会导致大量 SFP的存在，此时， SFC Control ler要负责为每个 SFP分配唯一 SFP ID , 相应的业务转发设备 SFF需要存储每个 SFP ID所对应的转发条目，这就造成需要大量的信令来将这些 SFP信息配置到 SFF上，所需的信令开销大，相应的 SFF需要维护的转发条目多，需要的存储空间大，转发效率低。发明内容本发明实施例提供一种业务流的处理方法、装置及设备，以解决现有技术中 SFC控制器在向 SFF配置 SFP信息过程中，所需信令开销大，相应地， SFF需要维护的转发条目多的问题。 In actual network deployment, multiple sfs may be deployed for an SF. According to the existing technical solution, the SFC Control Manager selects any sf corresponding to an SF. A large number of sfs will result in the existence of a large number of SFPs. In this case, the SFC Controller is responsible for assigning a unique SFP ID to each SFP. The corresponding service forwarding device SFF needs to store the forwarding entries corresponding to each SFP ID. A large amount of signaling is used to configure the SFP information on the SFF. The required signaling overhead is large. The corresponding SFF needs to maintain more forwarding entries, requires more storage space, and has lower forwarding efficiency. SUMMARY OF THE INVENTION The embodiments of the present invention provide a method, a device, and a device for processing a service flow, so as to solve the problem that the SFC controller needs to maintain the SFP information in the SFF in the prior art, and accordingly, the SFF needs to be maintained. The problem of forwarding more entries.

第一方面，本发明实施例提供一种业务流的处理方法，包括：接收针对一业务流的业务链服务请求消息，所述业务链服务请求消息包括与所述业务流对应的匹配规则，以及所述业务流需要的业务链 In a first aspect, an embodiment of the present invention provides a service flow processing method, including: receiving a service chain service request message for a service flow, where the service chain service request message includes a matching rule corresponding to the service flow, and The business chain required by the business flow

SFC , 所述业务链中包括依序排列的多个网络业务功能 SF; SFC, the service chain includes a plurality of network service functions SF arranged in sequence;

根据所述多个 SF分别生成对应的、用于形成与所述 SFC对应的业务链实例 SFP的 SFP元素，并为生成的所述 SFP分配对应的标识 SFP ID; 其中，若判断获知所述多个 SF中包括无状态 SF, 则所述无状态 SF对应的 Generating, according to the plurality of SFs, a corresponding SFP element for forming a service chain instance SFP corresponding to the SFC, and assigning a corresponding identifier SFP ID to the generated SFP; SF includes a stateless SF, and the stateless SF corresponds to

SFP元素为业务功能类型的元素； The SFP element is an element of the business function type;

将所述 SFP 以及所述 SFP ID发送给各业务转发设备 SFF, 以供所述 Sending the SFP and the SFP ID to each service forwarding device SFF for the

SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理；其中所述The SFF processes the service flow including the SFP ID according to the SFP element;

SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理包括：所述 SFF为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流。 The SFF processing the service flow including the SFP ID according to the SFP element includes: the SFF selecting a network service function instance for the SFP element belonging to the service function type to process the service flow.

结合第一方面，在第一方面的第一种可能实现的方式中，所述根据所述多个 SF分别生成对应的、用于形成与所述 SFC对应的业务链实例 SFP 的 SFP元素，还包括： With reference to the first aspect, in a first possible implementation manner of the first aspect, the generating, by the multiple SFs, a corresponding SFP element for forming a service chain instance SFP corresponding to the SFC, Includes:

若判断获知所述多个 SF中包括有状态 SF, 则选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素。 If it is determined that the plurality of SFs include the state SF, selecting a network service function An example is the SFP element corresponding to the stateful SF.

结合第一方面的第一种可能实现的方式，在第一方面的第二种可能的实现方式中，所述 SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理，还包括： With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the SFF processes, according to the SFP element, a service flow that includes the SFP ID, and includes :

所述 SFF将所述业务流发送到 SFP元素所对应的网络业务功能实例进行处理。 The SFF sends the service flow to the network service function instance corresponding to the SFP element for processing.

结合第一方面第一种或者第二种可能的实现方式，在第一方面的第三种可能实现的方式中，所述选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素，包括： In conjunction with the first or second possible implementation of the first aspect, in a third possible implementation manner of the first aspect, the selecting a network service function instance is the SFP element corresponding to the stateful SF, Includes:

选择一个负载满足预设条件的网络业务功能实例作为所述有状态 SF 所对应的 SFP元素。 Select a network service function instance whose load meets the preset condition as the SFP element corresponding to the stateful SF.

结合第一方面，在第一方面的第四种可能的实现方式中，所述 SFF为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流，包括： With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the SFF selects a network service function instance for the SFP element that belongs to the service function type to process the service flow, including:

所述 SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 The SFF selects a network service function instance whose load satisfies a preset condition for the SFP element belonging to the service function type to process the service flow.

结合第一方面的第四种可能的实现方式，在第一方面的第五种可能的实现方式中，所述 SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流，包括： With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the SFF selects, for an SFP element that belongs to a service function type, a network service function instance that meets a preset condition To process the service flow, including:

在属于业务功能类型的 SFP 元素对应各网络业务功能实例中，所述 In the network service function instance corresponding to the SFP element belonging to the service function type,

SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 The SFF selects a network service function instance whose load satisfies a preset condition for the SFP element belonging to the service function type to process the service flow.

结合第一方面的第五种可能的实现方式，在第一方面的第六种可能的实现方式中，所述 SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流，还包括： With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the SFF selects, for an SFP element that belongs to a service function type, a network service function instance that meets a preset condition To process the service flow, the method further includes:

在与所述 SFF直接相连的属于业务功能类型的 SFP元素对应的各网络业务功能实例中，所述 SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 In the network service function instance corresponding to the service element type SFP element that is directly connected to the SFF, the SFF selects a network service function instance that meets a preset condition for the SFP element belonging to the service function type to process the The business flow.

结合第一方面的第三种至第六种任一种可能的实现方式，在第一方面的第七种可能的实现方式中，所述选择一个负载满足预设条件的网络业务功能实例具体为： With reference to the third to sixth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the selecting a network that meets a preset condition The business function example is specifically as follows:

选择一个负载小于一阈值的网络业务功能实例；或 Select an instance of the network service function with a load less than a threshold; or

选择一个负载满足一业务需求的网络业务功能实例。 Select a network service function instance that meets a business requirement.

第二方面，本发明实施例提供一种业务流的处理方法，包括：接收控制器发送的业务链实例 SFP和对应的标识 SFP ID, 其中，所述 In a second aspect, the embodiment of the present invention provides a service flow processing method, including: receiving a service chain instance SFP and a corresponding identifier SFP ID sent by a controller, where

SFP是由所述控制器根据业务流需要的业务链 SFC生成的，并由所述控制器为生成的所述 SFP分配对应的标识 SFP ID , 所述 SFP 中包括多个 SFP 元素，所述 SFP元素为所述控制器根据所述 SFC中包括的依序排列的多个网络业务功能 SF分别生成的； The SFP is generated by the controller according to the service chain SFC required by the service flow, and the controller allocates a corresponding identifier SFP ID to the generated SFP, where the SFP includes multiple SFP elements, and the SFP The element is generated by the controller according to a plurality of network service functions SF sequentially arranged in the SFC;

根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理；其中，所述根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理包括：为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流。 Processing the service flow including the SFP ID according to the SFP element; wherein, the processing, by the SFP element, the service flow including the SFP ID includes: selecting, for the SFP element belonging to the service function type An instance of a network service function to process the traffic flow.

结合第二方面，在第二方面的第一种可能的实现方式中，所述根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理，还包括： With reference to the second aspect, in a first possible implementation manner of the second aspect, the processing, by the SFP element, the service flow that includes the SFP ID, further includes:

将所述业务流发送到 SFP元素所对应的网络业务功能实例进行处理。结合第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，所述为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流，包括： The service flow is sent to the network service function instance corresponding to the SFP element for processing. With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the selecting, by the SFP element belonging to the service function type, a network service function instance to process the service flow, Includes:

为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 A traffic service function instance that satisfies a preset condition is selected for an SFP element belonging to a service function type to process the service flow.

结合第二方面的第二种可能的实现方式，在第二方面的第三种可能的实现方式中，所述为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流，包括： With the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the SFP element that belongs to the service function type selects a network service function instance that meets a preset condition. Processing the service flow, including:

在属于业务功能类型的 SFP元素对应各网络业务功能实例中，为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 In the network service function instance corresponding to the service function type, the SFP element belonging to the service function type selects a network service function instance whose load meets the preset condition to process the service flow.

结合第二方面的第二种或者第三种可能的实现方式，在第二方面的第四种可能的实现方式中，所述选择一个负载满足预设条件的网络业务功能实例具体为：选择一个负载小于一阈值的网络业务功能实例；或 With reference to the second or the third possible implementation manner of the second aspect, in the fourth possible implementation manner of the second aspect, the example of selecting a network service function that meets a preset condition is: Select an instance of the network service function with a load less than a threshold; or

第三方面，本发明实施例提供一种控制器，包括： In a third aspect, an embodiment of the present invention provides a controller, including:

接收模块，用于接收针对一业务流的业务链服务请求消息，所述业务链服务请求消息包括与所述业务流对应的匹配规则，以及所述业务流需要的业务链 SFC , 所述业务链中包括依序排列的多个网络业务功能 SF; 处理模块，用于根据所述多个 SF分别生成对应的、用于形成与所述 SFC对应的业务链实例 SFP的 SFP元素，并为生成的所述 SFP分配对应的标识 SFP ID; 其中，若判断获知所述多个 SF中包括无状态 SF，则所述无状态 SF对应的 SFP元素为业务功能类型的元素； a receiving module, configured to receive a service chain service request message for a service flow, where the service chain service request message includes a matching rule corresponding to the service flow, and a service chain SFC required by the service flow, the service chain The method includes: a plurality of network service functions SF arranged in sequence; and a processing module, configured to generate, according to the plurality of SFs, corresponding SFP elements for forming a service chain instance SFP corresponding to the SFC, and generate the generated The SFP allocates a corresponding identifier SFP ID; wherein, if it is determined that the plurality of SFs include a stateless SF, the SFP element corresponding to the stateless SF is an element of a service function type;

发送模块，用于将所述 SFP以及所述 SFP ID发送给各业务转发设备 SFF, 以供所述 SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理；其中所述 SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理包括：所述 SFF为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流。 a sending module, configured to send the SFP and the SFP ID to each service forwarding device SFF, where the SFF processes the service flow including the SFP ID according to the SFP element; The SFP element processing the service flow including the SFP ID includes: the SFF selecting a network service function instance for the SFP element belonging to the service function type to process the service flow.

结合第三方面，在第三方面的第一种可能的实现方式中，所述处理模块还用于： In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the processing module is further configured to:

若判断获知所述多个 SF中包括有状态 SF, 则选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素。 If it is determined that the plurality of SFs include the state SF, a network service function instance is selected as the SFP element corresponding to the stateful SF.

结合第三方面的第一种可能的实现方式，在第三方面的第二种可能的实现方式中，所述选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素，包括： With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the selecting a network service function instance as the SFP element corresponding to the stateful SF includes:

结合第三方面的第二种可能的实现方式，在第三方面的第三种可能的实现方式中，所述选择一个负载满足预设条件的网络业务功能实例具体为： With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the selecting a network service function instance in which a load meets a preset condition is:

第四方面，本发明实施例提供一种业务转发设备，包括：接收模块，用于接收控制器发送的业务链实例 SFP和对应的标识 SFP ID, 其中，所述 SFP 是由所述控制器根据业务流需要的业务链 SFC 生成的，并由所述控制器为生成的所述 SFP分配对应的标识 SFP ID, 所述 SFP 中包括多个 SFP元素，所述 SFP元素为所述控制器根据所述 SFC中包括的依序排列的多个网络业务功能 SF分别生成的； A fourth aspect of the present invention provides a service forwarding device, including: a receiving module, configured to receive a service chain instance SFP and a corresponding identifier SFP ID sent by the controller, where the SFP is generated by the controller according to a service chain SFC required by the service flow, and configured by the controller And generating, by the SFP, a corresponding SFP ID, where the SFP includes a plurality of SFP elements, where the SFP element is generated by the controller according to the plurality of network service functions SF sequentially arranged in the SFC. of;

处理模块，用于根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理；其中，所述根据所述 SFP元素对所述业务流进行处理包括：为属于业务功能类型的 SFP 元素选择一个网络业务功能实例来处理所述业务流。 a processing module, configured to process, according to the SFP element, a service flow that includes the SFP ID, where the processing, according to the SFP element, processing the service flow, includes: selecting, for an SFP element that belongs to a service function type An instance of a network service function to process the traffic flow.

结合第四方面，在第四方面的第一种可能的实现方式中，所述处理模块还用于： In conjunction with the fourth aspect, in a first possible implementation manner of the fourth aspect, the processing module is further configured to:

将所述业务流发送到 SFP元素所对应的网络业务功能实例进行处理。结合第四方面的第一种可能的实现方式，在第四方面的第二种可能的实现方式中，所述处理模块具体用于： The service flow is sent to the network service function instance corresponding to the SFP element for processing. In conjunction with the first possible implementation of the fourth aspect, in a second possible implementation manner of the fourth aspect, the processing module is specifically configured to:

结合第四方面的第二种可能的实现方式，在第四方面的第三种可能的实现方式中，所述处理模块具体用于： In conjunction with the second possible implementation of the fourth aspect, in a third possible implementation manner of the fourth aspect, the processing module is specifically configured to:

结合第四方面的第二种或者第三种可能的实现方式，在第四方面的第四中可能的实现方式中，所述选择一个负载满足预设条件的网络业务功能实例具体为： With reference to the second or third possible implementation manner of the fourth aspect, in a possible implementation manner of the fourth aspect, the network service function instance that selects a load that meets a preset condition is specifically:

第五方面，本发明实施例提供一种控制器，包括： In a fifth aspect, an embodiment of the present invention provides a controller, including:

处理器和存储器，所述存储器存储执行指令，当所述控制器运行时，所述处理器与所述存储器之间通信，所述处理器执行所述执行指令使得所述控制器执行如第一方面中任一项所述的方法。第六方面，本发明实施例提供一种业务转发设备，包括：处理器和存储器，所述存储器存储执行指令，当所述业务转发设备运行时，所述处理器与所述存储器之间通信，所述处理器执行所述执行指令使得所述业务转发设备执行如第二方面中任一项所述的方法。 a processor and a memory, the memory storing execution instructions, when the controller is running, the processor is in communication with the memory, the processor executing the execution instruction such that the controller performs as the first The method of any of the aspects. According to a sixth aspect, an embodiment of the present invention provides a service forwarding device, including: a processor and a memory, where the memory stores an execution instruction, and when the service forwarding device is running, the processor communicates with the memory, The processor executing the execution instructions causes the service forwarding device to perform the method of any of the second aspects.

本发明实施例业务流的处理方法、装置及设备，通过对 SF 进行划分，在控制器根据业务链服务请求消息生成业务链实例 SFP过程中，对于无状态 SF，控制器不为该 SF选取具体的 SF实例，而将其对应的 SFP元素设置为业务功能类型的元素，该业务功能类型包括多个具有相同功能和配置的 SF实例，控制器将 SFP和 SFP ID发送给各 SFF, 以供 SFF根据 SFP 元素对包括有 SFP ID的业务流进行处理，由 SFF为属于业务功能类型的 SFP元素选择一个具体 SF实例来处理业务流，从而可以有效减少 SFP和用于唯一标识 SFP的 SFP ID的数量，并且减少了控制器为 SFF配置 SFP所需的信令开销，进而节省了各 SFF存储该配置信息的存储空间。附图说明为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。 In the process, the device, the device and the device for processing the service flow, the SF is divided, and in the process of generating the service chain instance SFP according to the service chain service request message, the controller does not select the specific SF for the SF. SF instance, and set its corresponding SFP element as an element of the service function type, the service function type includes multiple SF instances with the same function and configuration, and the controller sends the SFP and SFP ID to each SFF for SFF According to the SFP element, the service flow including the SFP ID is processed, and the SFF selects a specific SF instance for the SFP element belonging to the service function type to process the service flow, thereby effectively reducing the number of SFPs and SFP IDs for uniquely identifying the SFP. And reducing the signaling overhead required by the controller to configure the SFP for the SFF, thereby saving the storage space for each SFF to store the configuration information. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

图 1为本发明业务流的处理方法实施例一的流程图； 1 is a flowchart of Embodiment 1 of a method for processing a service flow according to the present invention;

图 2为本发明业务流的处理方法实施例二的流程图； 2 is a flowchart of Embodiment 2 of a method for processing a service flow according to the present invention;

图 3为本发明实现业务功能链功能的网络架构图； 3 is a network architecture diagram of a service function chain function implemented by the present invention;

图 4为本发明业务流的处理方法实施例三的信令流程图； 4 is a signaling flowchart of Embodiment 3 of a method for processing a service flow according to the present invention;

图 5为本发明业务流的处理方法中 SFC 控制器生成 SFP的流程图；图 6为本发明业务流处理方法各 SFF与 SF实例的连接举例示意图；图 7为本发明控制器实施例一的结构示意图； FIG. 5 is a flowchart of an SFP controller generating an SFP in a service flow processing method according to the present invention; FIG. 6 is a schematic diagram of a connection between each SFF and an SF instance in a service flow processing method according to the present invention; Schematic;

图 8为本发明业务转发设备实施例一的结构示意图； 8 is a schematic structural diagram of Embodiment 1 of a service forwarding device according to the present invention;

图 9为本发明控制器实施例二的结构示意图； 9 is a schematic structural diagram of Embodiment 2 of a controller according to the present invention;

图 10为本发明业务转发设备实施例二的结构示意图。具体实施方式 FIG. 10 is a schematic structural diagram of Embodiment 2 of a service forwarding device according to the present invention. detailed description

为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

本发明实施例所涉及的网络业务功能（Service Function, 简称 SF) 指能够对业务流进行处理的网络功能，例如，网络地址转换设备 ( Network Address Translation, 简称 NAT) 、防火墙、 TCP力口速器等。各网络业务功能 SF可以有一个或者多个具体的网络业务功能实例 sf，例如一个具体的防火墙设备。 A network service function (SF) refers to a network function capable of processing a service flow, for example, a network address translation device (NAT), a firewall, and a TCP power port rater. Wait. Each network service function SF can have one or more specific network service function instances sf, such as a specific firewall device.

本发明实施例所涉及的业务链是业务功能链（Service Function Chain, 简称 SFC) 的简称，其将多个网络业务功能 SF按照一定顺序连接在一起就形成一个业务链， SFC中的网络业务功能 SF按照各 SF在 SFC中的先后顺序，依次对业务流进行处理。例如，一 SFC为 TCP加速器→防火墙一网络地址转换设备（NAT) ，即业务流需要先经过 TCP加速器的处理后，经过防火墙处理，最后经过 NAT处理。 The service chain of the embodiment of the present invention is an abbreviation of a service function chain (SFC), which connects multiple network service functions SF in a certain order to form a service chain, and network service functions in the SFC. The SF processes the service flows in turn according to the order of the SFs in the SFC. For example, an SFC is a TCP accelerator → a firewall-network address translation device (NAT), that is, a service flow needs to be processed by a TCP accelerator, processed by a firewall, and finally processed by NAT.

本发明实施例所涉及的业务链实例（Service Function Path, 简称 SFP)是 SFC的一个具体实例，其中包括了 SFC中各 SF的具体网络业务功能实例 sf，由各 SF对应的 sf按照各 SF在 SFC中的顺序组成，例如， TCP 加速器对应的 sf为 sfl，防火墙对应的 sf为 sf2， NAT对应的 sf为 sf2，则上述 SFC的具体实例 SFP为 sf I→sf2→sf3。 A Service Function Path (SFP) in the embodiment of the present invention is a specific example of an SFC, and includes a specific network service function instance sf of each SF in the SFC, and the SF corresponding to each SF is in accordance with each SF. The sequence of the SFC is composed of, for example, the sf corresponding to the TCP accelerator is sfl, the sf corresponding to the firewall is sf2, and the sf corresponding to the NAT is sf2, and the specific instance SFP of the SFC is sf I→sf2→sf3.

本发明实施例所涉及的 SFP ID ( SFP IDentifier ) 为用于唯一标识一个 SFP的标识，每一个 SFP都会有一个与之对应的 SFP ID对其进行标识。 The SFP ID (SFP IDentifier) in the embodiment of the present invention is used to uniquely identify an SFP identifier, and each SFP has a corresponding SFP ID to identify it.

本发明实施例所涉及的业务转发设备（ Service Function Forwarder, 简称 SFF) ，其负责根据 SFP ID将业务流转发到与该 SFP ID 对应的 SFP 中包括的各 sf 上，由各 sf 对业务流进行处理，其中，一个 SFF可以连接多个 sf。 The Service Function Forwarder (SFF) is used to forward the service flow to each sf included in the SFP corresponding to the SFP ID according to the SFP ID, and the service flow is performed by each sf. Processing, wherein one SFF can connect multiple sfs.

本发明实施例所述涉及的控制器为 SFC 控制器，其负责业务链的生成，对 SFF进行配置，以及相关的管理。 The controller involved in the embodiment of the present invention is an SFC controller, which is responsible for the business chain. Cheng, configure SFF, and related management.

本发明各实施例中将网络业务功能 SF分为两种类型，（1 )有状态 SF ( stateful SF) ， ( 2 ) 无状态 SF ( stateless SF) 。 In various embodiments of the present invention, the network service function SF is divided into two types, (1) stateful SF, and (2) stateless SF.

具体地，有状态 SF ( stateful SF) 为在对业务流进行处理的过程中会保存业务流的状态信息或者上下文信息的网络业务功能，举例而言， NAT设备在将业务流的私网 IPv4值转换为公网 IPv4地址时，会保存私网 IPv4地址与公网 IPv4地址之间的映射关系，以便之后在将返回的业务流的公网 IPv4地址转换为对应的私网 IPv4地址，即 NAT设备为有状态 SF。防火墙也可以分为有状态 SF, 具体地，防火墙中通常为所检测的业务流维护一个上下文信息，这样进行入侵检测时，对业务流的多个数据包进行检测根据其上下文信息断定业务流是否可信，即防火墙设备中维护有业务流的状态信息。因此，在本发明中将业务流的数据包经过一 SF对应的实例 sf后，该 sf要求该业务流的后续数据包也要经过该 sf，将具有此种特性的网络业务功能实例 sf 所属网络业务功能 SF定义为有状态 SF。 Specifically, a stateful SF is a network service function that stores state information or context information of a service flow in a process of processing a service flow. For example, the NAT device is in a private network IPv4 value of the service flow. When the IPv4 address is converted to the public network, the mapping between the private network IPv4 address and the public network IPv4 address is saved, so that the public network IPv4 address of the returned service flow is converted to the corresponding private network IPv4 address, that is, the NAT device. For stateful SF. The firewall can also be classified into a stateful SF. Specifically, the firewall generally maintains a context information for the detected service flow. When performing intrusion detection, the multiple packets of the service flow are detected according to the context information to determine whether the service flow is determined. Trusted, that is, the state information of the service flow is maintained in the firewall device. Therefore, in the present invention, after the data packet of the service flow passes through the instance sf corresponding to the SF, the sf requires that the subsequent data packet of the service flow also passes through the sf, and the network service function instance sf having the characteristic belongs to the network. The business function SF is defined as a stateful SF.

无状态 SF ( stateless SF) 为在对业务流进行处理的过程中不会保存业务流的状态信息或者上下文信息的网络业务功能，例如，利用端口号执行简单包过滤功能的设备。因此，在本发明中将业务流的数据包经过一 SF对应的实例 sf后，并不要求改业务流的后续数据包也要经过该 sf，将具有此种特性的网络业务功能实例 sf所属网络业务功能 SF定义为无状态 SF。 Stateless SF (Networkless SF) is a network service function that does not store state information or context information of a service flow during processing of a service flow, for example, a device that performs a simple packet filtering function using a port number. Therefore, in the present invention, after the data packet of the service flow passes through the instance sf corresponding to the SF, the subsequent data packet of the service flow is not required to pass through the sf, and the network service function instance sf having the characteristic belongs to the network. The business function SF is defined as a stateless SF.

图 1为本发明业务流的处理方法实施例一的流程图，本实施例的执行主体为控制器，具体可以为 SFC控制器，如图 1所示，本实施例的方法可以包括： 1 is a flowchart of a first embodiment of a method for processing a service flow according to the present invention. The main body of the embodiment is a controller, which may be an SFC controller. As shown in FIG. 1, the method in this embodiment may include:

歩骤 101、接收针对一业务流的业务链服务请求消息，业务链服务请求消息包括与业务流对应的匹配规则，以及业务流需要的业务链 SFC, 业务链中包括依序排列的多个网络业务功能 SF。 Step 101: Receive a service chain service request message for a service flow, where the service chain service request message includes a matching rule corresponding to the service flow, and a service chain SFC required by the service flow, where the service chain includes multiple networks arranged in sequence Business function SF.

其中，业务链服务请求消息包括的与业务流对应的匹配规则，该匹配规则具体可以为五元组信息，即业务流的源 IP地址，源端口，目的 IP 地址，目的端口和传输层协议号。 The service chain service request message includes a matching rule corresponding to the service flow, and the matching rule may be a quintuple information, that is, a source IP address, a source port, a destination IP address, a destination port, and a transport layer protocol number of the service flow. .

歩骤 102、根据多个 SF分别生成对应的、用于形成与 SFC对应的业务链实例 SFP的 SFP元素，并为生成的 SFP分配对应的标识 SFP ID ; 其中，若判断获知多个 SF中包括无状态 SF，则无状态 SF对应的 SFP元素为业务功能类型的元素。 Step 102: Generate corresponding services for forming an SFC corresponding to each of the multiple SFs The SFP element of the SFP is chained, and the corresponding SFP ID is assigned to the generated SFP. If it is determined that the plurality of SFs include the stateless SF, the SFP element corresponding to the stateless SF is an element of the service function type.

具体地，根据业务流的业务链服务请求消息中的业务流需要的 SFC , 生成具体的业务链实例 SFP , SFP中包含多个与 SFC中的 SF相对应的 SFP 元素，若判断获知 SF中包括无状态 SF，则选择业务功能类型的元素为该无状态 SF对应的 SFP元素，其中，业务功能类型可以为包含多个 SF实例具有相同功能和配置，这些 SF实例能够为业务流提供相同的服务，即当判断获知 SFC中的 SF包括无状态 SF，则只需要指示该业务流需要经过的业务功能类型，并不需要指定具体要经过的 SF实例。 Specifically, according to the SFC required by the service flow in the service chain service request message of the service flow, a specific service chain instance SFP is generated, and the SFP includes multiple SFP elements corresponding to the SF in the SFC, and if the judgment is included in the SF, The stateless SF, the element of the service function type is selected as the SFP element corresponding to the stateless SF, where the service function type may have the same function and configuration for including multiple SF instances, and the SF instances can provide the same service for the service flow. That is, when it is determined that the SF in the SFC includes the stateless SF, it only needs to indicate the type of service function that the service flow needs to pass, and does not need to specify the SF instance to be specifically passed.

歩骤 103、将 SFP以及 SFP ID发送给各业务转发设备 SFF , 以供 SFF 根据 SFP元素对包括有 SFP ID的业务流进行处理。 Step 103: Send the SFP and the SFP ID to each service forwarding device SFF, so that the SFF processes the service flow including the SFP ID according to the SFP element.

其中 SFF根据 SFP元素对包括有 SFP ID的业务流进行处理可以包括： SFF为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理业务流。 The SFF processing the service flow including the SFP ID according to the SFP element may include: SFF selects a network service function instance for the SFP element belonging to the service function type to process the service flow.

具体地，将 SFP 以及与该 SFP对应的 SFP ID发送给各 SFF , 各 SFF 对其自身维护的业务转发表进行更新。 Specifically, the SFP and the SFP ID corresponding to the SFP are sent to each SFF, and each SFF updates the service forwarding table maintained by itself.

可选地，在歩骤 102中，根据多个 SF分别生成对应的、用于形成与 SFC对应的业务链实例 SFP的 SFP元素过程中，若判断获知多个 SF中包括有状态 SF, 则选择一网络业务功能实例作为有状态 SF所对应的 SFP 元素，即直接选择该 SF中的一个具体的网络业务功能实例 sf作为其对应的 SFP元素。 Optionally, in step 102, the SFP element corresponding to the service chain instance SFP corresponding to the SFC is generated according to the multiple SFs, and if it is determined that the plurality of SFs include the status SF, the method is selected. A network service function instance is used as the SFP element corresponding to the stateful SF, that is, a specific network service function instance sf in the SF is directly selected as its corresponding SFP element.

进一歩地，在歩骤 103中， SFF根据 SFP元素对包括有 SFP ID的业务流进行处理，还可以为： SFF将业务流发送到 SFP元素所对应的网络业务功能实例进行处理。即 SFP元素为一网络业务功能实例时， SFF直接将业务流发送到该网络业务功能实例，由该网络业务功能实例对该业务流进行处理。 Further, in step 103, the SFF processes the service flow including the SFP ID according to the SFP element, and may also be: SFF sends the service flow to the network service function instance corresponding to the SFP element for processing. That is, when the SFP element is a network service function instance, the SFF directly sends the service flow to the network service function instance, and the service flow is processed by the network service function instance.

在上述歩骤中，选择一网络业务功能实例作为有状态 SF 所对应的 SFP元素，可以为根据各网络业务功能实例的负载信息，选择一负载满足预设条件的网络业务功能实例作为该有状态 SF所对应的 SFP元素，该预设条件可以为负载小于一阈值，也可以为负载满足一业务需求，这里可以根据需要灵活设置，一种优选的方式，可以选择一负载最小的网络业务功能实例。 In the foregoing step, the network service function instance is selected as the SFP element corresponding to the stateful SF, and the network service function instance that meets the preset condition is selected as the state according to the load information of each network service function instance. SFP element corresponding to SF, the pre- The condition may be that the load is less than a threshold, or the load satisfies a service requirement, and may be flexibly set according to requirements. In a preferred manner, a network service function instance with a minimum load may be selected.

业务流达到 SFF， SFF根据该业务流对应的 SFP中的 SFP元素，将业务流通过各 SFF转发到相应的 SFP元素上，其中， SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理该业务流，该预设条件可以根据需要灵活设置，可以为负载小于一阈值，也可以为负载满足一业务需求，优选的可以选择一负载最小的网络业务功能实例。 The service flow reaches the SFF, and the SFF forwards the service flow to the corresponding SFP element through the SFP element according to the SFP element in the SFP corresponding to the service flow, where the SFF selects a load for the SFP element belonging to the service function type to meet the preset condition. The network service function instance is used to process the service flow. The preset condition can be flexibly set according to requirements. The load may be less than a threshold, or the load may satisfy a service requirement. Preferably, a network service function instance with a minimum load may be selected.

SFF在处理业务流过程中， SFP元素为业务功能类型，则 SFF在属于业务功能类型的 SFP元素对应各网络业务功能实例中，为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理业务流，即在该属于业务功能类型的 SFP元素对应的所有网络业务功能实例中根据各网络业务功能实例的负载情况选取一网络业务功能实例。 In the process of processing the service flow, the SFP element is a service function type, and the SFF selects a network whose load meets the preset condition for the SFP element belonging to the service function type in the network service function instance corresponding to the service function type. The service function instance is used to process the service flow, that is, in the network service function instance corresponding to the SFP element of the service function type, a network service function instance is selected according to the load condition of each network service function instance.

可选的，在属于业务功能类型的 SFP元素对应的所有的网络业务功能实例中选取的网络业务功能实例未与该 SFF直接相连，则该 SFF将业务流转发到与满足预设条件的网络业务功能实例直接相连的 SFF上， SFF在与其相连的属于业务功能类型的 SFP元素对应的各网络业务功能实例中，为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理业务流。 Optionally, if the network service function instance selected in the network service function instance corresponding to the SFP element that belongs to the service function type is not directly connected to the SFF, the SFF forwards the service flow to the network service that meets the preset condition. On the SFF where the function instance is directly connected, the SFF selects a network service function instance that meets the preset condition for the SFP element that belongs to the service function type in each network service function instance corresponding to the SFP element that belongs to the service function type. Process business flows.

本实施例，通过接收针对一业务流的业务链服务请求消息，该业务链服务请求消息包括与业务流对应的匹配规则，以及业务流需要的业务链 SFC,根据 SFC中的多个 SF分别生成对应的、用于形成与 SFC对应的业务链实例 SFP的 SFP元素，并为生成的 SFP分配对应的标识 SFP ID , 其中，若判断获知多个 SF中包括无状态 SF，则对应的 SFP元素为业务功能类型的元素，该业务功能类型包含多个具有相同功能和配置的 SF实例，即控制器不为该无状态 SF指定具体要经过的 SF实例，将 SFP和 SFP ID 发送给各 SFF, 以供 SFF根据 SFP元素对包括有 SFP ID的业务流进行处理，由 SFF为属于业务功能类型的 SFP元素选择一个具体的 SF实例来处理业务流，本实施例的技术方案通过对 SF的划分，对无状态 SF并不选取具体实例，从而可以有效减少 SFP和用于唯一标识 SFP的 SFP ID的数量，并且减少了控制器为 SFF配置 SFP所需的信令开销，进而节省了各 SFF存储该配置信息的存储空间。 In this embodiment, by receiving a service chain service request message for a service flow, the service chain service request message includes a matching rule corresponding to the service flow, and a service chain SFC required by the service flow, which is respectively generated according to multiple SFs in the SFC. Corresponding SFP element for forming a service chain instance SFP corresponding to the SFC, and assigning a corresponding identifier SFP ID to the generated SFP, wherein if it is determined that the plurality of SFs include the stateless SF, the corresponding SFP element is An element of a service function type, the service function type includes a plurality of SF instances having the same function and configuration, that is, the controller does not specify a specific SF instance to pass through for the stateless SF, and sends the SFP and the SFP ID to each SFF to For the SFF to process the service flow including the SFP ID according to the SFP element, the SFF selects a specific SF instance for the SFP element of the service function type to process the service flow, and the technical solution of the embodiment divides the SF by Stateless SF is not selected As a specific example, the SFP and the number of SFP IDs for uniquely identifying the SFP can be effectively reduced, and the signaling overhead required for the controller to configure the SFP for the SFF is reduced, thereby saving the storage space for each SFF to store the configuration information.

图 2为本发明业务流的处理方法实施例二的流程图，本实施例的执行主体为业务转发设备 SFF, 如图 2所示，本实施例的方法可以包括： 2 is a flowchart of Embodiment 2 of a method for processing a service flow according to the present invention. The executor of this embodiment is a service forwarding device SFF. As shown in FIG. 2, the method in this embodiment may include:

歩骤 201、接收控制器发送的业务链实例 SFP和对应的标识 SFP ID。其中， SFP是由控制器根据业务流需要的业务链 SFC生成的，并由控制器为生成的 SFP分配对应的标识 SFP ID , SFP中包括多个 SFP元素， SFP 元素为控制器根据 SFC中包括的依序排列的多个网络业务功能 SF分别生成的。 Step 201: Receive a service chain instance SFP and a corresponding identifier SFP ID sent by the controller. The SFP is generated by the controller according to the service chain SFC required by the service flow, and the controller allocates a corresponding identifier SFP ID for the generated SFP, the SFP includes multiple SFP elements, and the SFP element is included in the SFC according to the controller. The plurality of network service functions SF are sequentially generated.

歩骤 202、根据 SFP元素对包括有 SFP ID的业务流进行处理；其中，根据 SFP元素对包括有所述 SFP ID的业务流进行处理具体可以为：为属于业务功能类型的 SFP 元素选择一个网络业务功能实例来处理所述业务流。 Step 202: Process the service flow including the SFP ID according to the SFP element. The process of processing the service flow including the SFP ID according to the SFP element may be: selecting a network for the SFP element belonging to the service function type. A business function instance to process the business flow.

即 SFP元素为业务功能类型时， SFF为该 SFP元素选择一个网络业务功能实例，由该网络功能实例处理该业务流。 That is, when the SFP element is a service function type, the SFF selects a network service function instance for the SFP element, and the network function instance processes the service flow.

可选地，根据 SFP元素对包括有 SFP ID的业务流进行处理还可以为：将业务流发送到 SFP元素所对应的网络业务功能实例进行处理，即 SFP元素为网络业务功能实例时， SFF直接将业务流发送到该网络业务功能实例进行处理。 Optionally, the processing of the service flow including the SFP ID according to the SFP element may be: sending the service flow to the network service function instance corresponding to the SFP element, that is, when the SFP element is a network service function instance, the SFF is directly The service flow is sent to the network service function instance for processing.

进一歩地， SFF在为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理业务流时，可以为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理业务流，负载满足预设条件的网络业务功能实例具体可以为，负载小于一阈值的网络业务功能实例，也可以为负载满足一业务需求的网络业务功能实例，这里可以根据需求灵活设置，优选地，可以根据各网络业务功能实例的负载信息选择一个负载最小的来处理业务流。 Further, when the SFF selects a network service function instance for the SFP element belonging to the service function type to process the service flow, the SFP element that belongs to the service function type can select a network service function instance whose load meets the preset condition to process the service. The network service function instance that meets the preset condition may be an instance of the network service function whose load is less than a threshold, or may be an instance of the network service function that meets a service requirement, where the load may be flexibly set according to requirements, preferably, The traffic flow can be processed according to the load information of each network service function instance to select a minimum load.

本实施例， SFF通过接收控制器发送的业务链实例 SFP和对应的标识 SFP ID , 根据 SFP元素对包括有 SFP ID的业务流进行处理，其中，为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理业务流，即 SFF接收控制器发送的 SFP中，该 SFP中包含属于业务功能类型的 SFP元素，即当 SF为无状态 SF时，控制器在生成 SFP过程中不为其指定具体的In this embodiment, the SFF processes the service flow including the SFP ID according to the SFP element by receiving the service chain instance SFP and the corresponding identifier SFP ID sent by the controller, where a network service is selected for the SFP element belonging to the service function type. Function instance to handle the business flow, ie In the SFP sent by the SFF receiving controller, the SFP includes an SFP element belonging to a service function type, that is, when the SF is a stateless SF, the controller does not specify a specific SFP during the process of generating the SFP.

SF 实例而只是设置一业务功能类型，由 SFF 为属于业务功能类型的 SFP 元素选择一个具体的 SF实例，因此， SFF在接收控制器发送的 SFP和对应的 SFP ID过程中，该 SFP中不包含属于业务功能类型的具体的 SF实例的The SF instance only sets a service function type, and the SFF selects a specific SF instance for the SFP element that belongs to the service function type. Therefore, the SFF does not include the SFP and the corresponding SFP ID sent by the receiving controller. Specific SF instances belonging to the type of business function

SFP元素，从有效减少 SFF接收 SFP和其对应的 SFP ID的数量，从而有效节省存储上述信息的存储空间。 The SFP element effectively reduces the number of SFPs and their corresponding SFP IDs, thereby effectively saving storage space for storing the above information.

下面采用一个具体的实施例，对图 1和图 2所示方法实施例的技术方案进行详细说明。图 3为本发明实现业务功能链功能的网络架构图，图 4 为本发明业务流的处理方法实施例三的信令流程图，图 4所示实施例是以图 3所示的网络架构为实施场景实现的业务流的处理方法，图 5为本发明业务流的处理方法中 SFC 控制器生成 SFP的流程图。 The technical scheme of the method embodiment shown in Figs. 1 and 2 will be described in detail below using a specific embodiment. FIG. 3 is a schematic diagram of a network architecture for implementing a service function chain function according to the present invention. FIG. 4 is a signaling flowchart of Embodiment 3 of a method for processing a service flow according to the present invention, and FIG. 4 is a network architecture shown in FIG. A method for processing a service flow implemented by a scenario is implemented. FIG. 5 is a flowchart of a method for generating an SFP by an SFC controller in a method for processing a service flow according to the present invention.

如图 3 所示，该网络架构主要包括功能实体包括： SFC控制器（SFC As shown in Figure 3, the network architecture mainly includes functional entities including: SFC controller (SFC)

Control ler )，各种 SF实例 sf (即 SF的一个具体实例，例如一个具体的防火墙设备 sf l ) ，分类器（Classif ier ) ，业务转发设备（SFF) 以及底层网络转发设备（例如层三路由器、层二交换机）。图 4所示实施例是在图 3 所示网络架构基础上实现的，如图 4 所示，本实施例的方法可以包括： Control ler ), various SF instances sf (a specific instance of SF, such as a specific firewall device sf l), classifier (Classif ier), service forwarding device (SFF), and underlying network forwarding device (such as layer three routers) , layer two switches). The embodiment shown in FIG. 4 is implemented on the basis of the network architecture shown in FIG. 3. As shown in FIG. 4, the method in this embodiment may include:

5401、 SFC 控制器接收针对一业务流的业务链服务请求消息。 S401. The SFC controller receives a service chain service request message for a service flow.

其中，该业务链服务请求消息包括与该业务流对应的匹配规则 The service chain service request message includes a matching rule corresponding to the service flow.

( match rule ) ，以及该业务流所需要的业务链 SFC, 该 SFC中包括依序排列的多个 SF。 (match rule), and the service chain SFC required by the service flow, the SFC includes a plurality of SFs arranged in sequence.

5402、 SFC控制器根据业务链服务请求消息为业务流生成 SFP。 S402: The SFC controller generates an SFP for the service flow according to the service chain service request message.

其中， SFC 控制器根据接收到的业务链服务请求消息中的 SFC , 该 SFC中包括多个 SF, 根据该多个 SF分别生成对应的、用于形成与该 SFC 对应的业务链实例 SFP的 SFP元素，该 SFP元素依序组成该 SFC对应的 SFP o 具体地， S402具体实现过程如图 5所示， S402具体歩骤可以包括： S5001 : SFC 控制器接收业务流的业务链服务请求消息。 The SFC controller includes, according to the SFC in the received service chain service request message, the SFC includes multiple SFs, and generates corresponding SFPs for forming a service chain instance SFP corresponding to the SFC according to the multiple SFs. The SFP element sequentially forms the SFP corresponding to the SFC. Specifically, the S402 implementation process is as shown in FIG. 5. The S402 specific steps may include: S5001: The SFC controller receives the service chain service request message of the service flow.

S5002 : SFC控制器判断 SFC中的 SF是否为有状态 SF (stateful SF)，若是则执行 S5003 , 若否则执行 S5004。 S5003 : 对于有状态 SF ( stateful SF) ， SFC控制器直接选取一个相应的 SF实例。 S5002: The SFC controller determines whether the SF in the SFC is a stateful SF, and if so, executes S5003, otherwise executes S5004. S5003: For stateful SF, the SFC controller directly selects a corresponding SF instance.

其中，如果该 SF属于 stateful SF, 该 SF存在多个实例 sf，则 SFC 控制器可以从多个 sf 中选取当前负载最低的实例，也可以选取一个可以满足业务链请求中业务流需求的 sf，而并不一定是负载最低的 sf。 SF实例指示了业务流所要经过的具体的 SF实例。 If the SF belongs to the stateful SF and the SF has multiple instances sf, the SFC controller may select an instance with the lowest current load from multiple sfs, or select an sf that satisfies the service flow requirement in the service chain request. It is not necessarily the lowest load sf. The SF instance indicates the specific SF instance that the traffic flow will go through.

S5004: 对于无状态 SF (stateless SF)， SFC控制器不为该 SF选取具体的 SF实例。 S5004: For stateless SF, the SFC controller does not select a specific SF instance for this SF.

其中，如果该 SF属于 stateless SF，则 SFC控制器不为该 SF指定具体的 SF实例，而只是在 SFP中设置一个 SF类型。 SF类型可以包含多个 SF实例。 SF类型指示了业务流需要经过某种类型的 SF实例，但并不指定具体要经过某个 SF实例，同一类型的 SF实例指能够为业务流提供相同服务的 SF实例，通常这些同种类型的 SF实例之间具有相同的功能和配置。 If the SF belongs to the stateless SF, the SFC controller does not specify a specific SF instance for the SF, but only sets an SF type in the SFP. An SF type can contain multiple SF instances. The SF type indicates that the service flow needs to pass through a certain type of SF instance, but does not specify that it needs to pass through an SF instance. The same type of SF instance refers to an SF instance that can provide the same service for the service flow, usually these same types. SF instances have the same functionality and configuration.

S5005 : 生成 SFP并为其分配一个唯一的 SFP ID。 S5005: Generate an SFP and assign it a unique SFP ID.

其中，若根据业务链服务请求生成 SFP后，如果已经存在相同 SFP可用， SFC 控制器可以为业务流选择该已有 SFP , 而不需要再生成新的 SFP , 并使用该已有 SFP对应的 SFP ID, 而如果不存在相同 SFP可用， SFC 控制器根据上述歩骤生成新的 SFP, 并为该 SFP分配新的 SFP ID o After the SFP is generated according to the service chain service request, if the same SFP is available, the SFC controller can select the existing SFP for the service flow, and does not need to generate a new SFP, and uses the SFP corresponding to the existing SFP. ID, and if the same SFP is not available, the SFC controller generates a new SFP based on the above steps and assigns a new SFP ID to the SFP.

举例说明 S5001-S5005生成 SFP的方式，假设业务流的业务链请求中的业务链 SFC为 SF1→SF2→SF3，其中 SF2为 stateless SF, SF1和 SF2 为 stateful SF, 其中， SF1的具体实例为 sf l， SF3的具体实例为 sf3，那么， SFC控制器生成的 SFP为 sf l→SF2→sf3，其中， SF2为 SF类型。 For example, the S5001-S5005 generates an SFP. Assume that the service chain SFC in the service chain is SF1→SF2→SF3, where SF2 is stateless SF, SF1 and SF2 are stateful SF, and the specific instance of SF1 is sf. l, the specific example of SF3 is sf3, then the SFP generated by the SFC controller is sf l→SF2→sf3, where SF2 is SF type.

5403、判断在 S402 中是否为业务链服务请求生成了新的 SFP , 则执行 S404, 若否则执行 S405。 5403. Determine whether a new SFP is generated for the service chain service request in S402, and execute S404, if otherwise, execute S405.

其中， SFC 控制器判断是否有新的 SFP生成。 Among them, the SFC controller determines whether there is a new SFP generation.

5404、 SFC 控制器根据新生成的 SFP 和其对应的 SFP ID , 对各 SFF 中的业务转发表进行配置。 5404. The SFC controller configures the service forwarding table in each SFF according to the newly generated SFP and its corresponding SFP ID.

当 SFC 控制器为业务链服务请求生成了新的 SFP和 SFP ID时，由于各 SFF的业务转发表中没有这个 SFP ID对应的转发信息，所以需要对各 SFF中的业务转发表进行更新，其中，各 SFF维护着一个用于转发数据包的业务转发表，其负责根据业务流所携带的 SFP ID将业务流转发到具体的 SF实例上，以使 SF实例对业务流进行处理，当 SFC控制器生成了新的 SFP和其对应的 SFP ID, SFC 控制器会将该信息配置到 SFF上，同时 SFC 控制器还会将 SFF所维护的业务转发表中的属于 SF类型的各 SF实例的负载信息配置到 SFF的业务转发表中。 SFF根据 SFC控制器发送的上述信息对自身维护的业务转发表进行更新。 When the SFC controller generates a new SFP and SFP ID for the service chain service request, the service forwarding table in each SFF needs to be updated because the forwarding information corresponding to the SFP ID is not included in the service forwarding table of each SFF. Each SFF maintains a packet for forwarding packets The service forwarding table is responsible for forwarding the service flow to the specific SF instance according to the SFP ID carried by the service flow, so that the SF instance processes the service flow, and the SFC controller generates a new SFP and its corresponding SFP. ID, the SFC controller configures the information to the SFF, and the SFC controller also configures the load information of each SF instance belonging to the SF type in the service forwarding table maintained by the SFF into the service forwarding table of the SFF. The SFF updates the service forwarding table maintained by itself according to the above information sent by the SFC controller.

SFF上维护的业务转发表的具体形式可以为表 2所示，以业务转发设备 SFF-X的业务转发表作举例说明，其中， SDP ID 1对应的 SFP为 sf l→ SF2→sf3 , sfl和 sf3为 SF实例， SF2为 SF类型， SF2具体包括的 SF实例有 sf21、 sf22、 sf23和 sf24，其中 locator是指 SF实例的位置信息， locator的形式可以分为两种：（1 )如果 SF实例与本 SFF相连则 locator 是 SF实例所连接的 SFF的接口；（2 ) 如果 SF实例不与本 SFF相连，例如位于下一跳的 SFF上，那么 locator就可以是该 SF实例所在 SFF的网络位置，例如 SFF的 IP地址。在该业务转发表中还维护了 SF类型的各 SF 实例的负载信息（load) 。 SFF通过 SFP ID来确定业务流的转发路径，同时在业务流中携带了一个 index值，该 index 值用于指示当前处理到了 SFP中的第几个 SF实例。表 2 业务转发设备 SFF-X所维护的业务转发表 The specific form of the service forwarding table maintained on the SFF can be as shown in Table 2. The service forwarding table of the service forwarding device SFF-X is used as an example. The SFP corresponding to the SDP ID 1 is sf l→ SF2→sf3, sfl and Sf3 is an SF instance, and SF2 is an SF type. The SF instances specifically included in SF2 are sf21, sf22, sf23, and sf24, where locator refers to the location information of the SF instance, and the locator can be divided into two types: (1) if the SF instance The locator is the interface of the SFF to which the SF instance is connected. (2) If the SF instance is not connected to the SFF, for example, on the SFF of the next hop, the locator may be the network location of the SFF where the SF instance is located. , such as the IP address of SFF. The load information (load) of each SF instance of the SF type is also maintained in the service forwarding table. The SFF determines the forwarding path of the service flow through the SFP ID, and carries an index value in the service flow. The index value is used to indicate the SF instances currently processed in the SFP. Table 2 Service forwarding table Service forwarding table maintained by SFF-X

S405、 SFC 控制器向分类器发送业务流的〈match rule, SFP ID〉。其中，若根据业务链服务请求生成 SFP后，如果已经存在相同 SFP可用， SFC 控制器可以为业务流选择该已有 SFP, 而不需要再生成新的 SFP 和与其对应的 SFP ID, 只需要将该业务流的 match rule加入到该 SFP ID 的 match rule中，并更新分类器中的〈match rule, SFP ID〉条目（即更新分类器中的匹配表）； S405. The SFC controller sends a <match rule, SFP ID> of the service flow to the classifier. If the SFP is generated according to the service chain service request, if the same SFP already exists, The SFC controller can select the existing SFP for the service flow, and does not need to generate a new SFP and its corresponding SFP ID, and only needs to add the match rule of the service flow to the match rule of the SFP ID, and Update the <match rule, SFP ID> entry in the classifier (ie update the match table in the classifier);

而如果不存在相同 SFP可用， SFC 控制器根据上述歩骤生成新的 SFP 和与其对应的 SFP ID, 并更新分类器中的〈match rule, SFP 10〉条目（即更新分类器中的匹配表） If the same SFP is not available, the SFC controller generates a new SFP and its corresponding SFP ID according to the above steps, and updates the <match rule, SFP 10> entry in the classifier (ie, updates the matching table in the classifier)

S406、分类器更新自身维护的匹配表。 S406. The classifier updates the matching table maintained by itself.

其中，分类器中维护了一个匹配表，如表 3所示，该匹配表中维护了 SFP ID及其对应的所有 match rule信息（即可能会存在多个业务流使用同一个 SFP的情况，所以一个 SFP ID可以对应多个 match rule ) ，并且分类器负责根据业务流的 mathch rule 和该匹配表对业务流进行 SFP ID 标记，即根据业务流的 match rule在匹配表中获取该 match rule对应的 SFP ID, 为业务流增加 SFC转发报文头（SFP ID) 。 A match table is maintained in the classifier. As shown in Table 3, the match table maintains the SFP ID and all corresponding match rule information (that is, there may be multiple service flows using the same SFP, so An SFP ID can correspond to multiple match rules, and the classifier is responsible for performing SFP ID marking on the service flow according to the service rule's mathch rule and the matching table, that is, obtaining the match rule in the matching table according to the match rule of the service flow. SFP ID, which adds an SFC forwarding header (SFP ID) to the service flow.

表 3 分类器中的匹配表举例 Table 3 Examples of matching tables in the classifier

在根据业务流的业务链服务请求生成 SFP 后，如果已经存在相同 SFP 可用，则分类器只需要将该业务流的 match rule加入到该 SFP ID的 match rule中 After the SFP is generated according to the service chain service request of the service flow, if the same SFP is available, the classifier only needs to add the match rule of the service flow to the match rule of the SFP ID.

而如果不存在相同 SFP可用， SFC 控制器根据上述歩骤生成新的 SFP 和与其对应的 SFP ID, 分类器将新的 SFP ID加入到匹配表中，并在匹配表中该新加入的 SFP ID的 match rule中，加入该业务流的 match rule。 If no SFP is available, the SFC controller generates a new SFP and its corresponding SFP ID according to the above steps, and the classifier adds the new SFP ID to the matching table, and the newly added SFP ID in the matching table. In the match rule, join the match rule of the service flow.

S407、分类器对业务流进行匹配和标记。 S407. The classifier matches and marks the service flow.

当业务流要由分类器进入 SFC 网络时，分类器将该业务流的 match rule和匹配表中 match rule进行匹配，当业务流与匹配表中某个 match rule匹配成功后，则将该 match rule所对应的 SFP ID标记在该业务流上。将标记后的业务流发送给与分类器功能集成在一起的 SFF0 , 再经过 SFF0转发到其他 SFF-X (例如， SFF-A , SFF-B等）， SFF-X负责根据 SFP ID 将业务流转发到 SF实例上。 When the traffic flow is to be entered by the classifier into the SFC network, the classifier matches the traffic flow The rule matches the match rule in the match table. After the service flow matches the match rule in the match table, the SFP ID corresponding to the match rule is marked on the service flow. The marked service flow is sent to the SFF0 integrated with the classifier function, and then forwarded to other SFF-Xs via SFF0 (for example, SFF-A, SFF-B, etc.), and the SFF-X is responsible for forwarding the service according to the SFP ID. Send to the SF instance.

S408、各 SFF根据业务流中所标记的 SFP ID和业务转发表对业务流进行转发。 S408. Each SFF forwards the service flow according to the SFP ID and the service forwarding table marked in the service flow.

需要说明的上述歩骤中， S404中 SFC 控制器与各 SFF之间的信令交互，以及 S405中 SFC控制器与分类器之间的信令交互，并不存在时间上的先后顺限制。 In the above steps, the signaling interaction between the SFC controller and each SFF in S404, and the signaling interaction between the SFC controller and the classifier in S405, there is no time limit.

本实施例，在根据业务流的业务链请求消息为业务流生成 SFP 过程中，将业务流需要的 SFC中的多个 SF分为有状态 SF和无状态 SF， SFC控制器为有状态 SF选取一具体的 SF实例，而不为无状态 SF选取具体的 SF 实例，而将该无状态 SF对应的 SFP元素设置为 SF类型，将生成的 SFP和 SFP ID发送给各 SFF, 各 SFF对其自身维护的业务转发表进行更新，根据更新后的业务转发表对业务流进行转发，由相应的 SF实例对业务流进行处理，即本实施例由 SFC 控制器对有状态 SF进行负载均衡控制（SFC 控制器为属于有状态 SF的 SF根据各 SF实例的负载信息选取一具体的 SF实例），而将无状态 SF的负载均衡控制交由业务转发设备进行处理（SFC控制器不为属于无状态 SF的 SF选取具体的 SF实例），因此相对于现有技术，本实施例有效减少了 SFC 控制器根据业务链服务请求所生成的 SFP 和对应的 SFP ID的数量，从而有效减少了 SFC 控制器为各 SFF配置 SFP 所需要的信令开销，进而相应地降低了各 SFF 所需维护的业务转发表条目，节省了各 SFF的存储空间，且 SFF中转发条目的减少可以提升转发效率。按照本发明实施例所描述的技术方案，假设网络中总共有 M个无状态 SF, 那么生成的 SFP ID就只是现有技术中的 SFP ID数量的 1/M, 相应地， SFF中所需存储的转发条目只是现有技术中转发条目数量的 1/M。 In this embodiment, in the process of generating an SFP for a service flow according to a service chain request message of a service flow, the multiple SFs in the SFC required by the service flow are classified into a stateful SF and a stateless SF, and the SFC controller selects a stateful SF. a specific SF instance, instead of selecting a specific SF instance for the stateless SF, setting the SFP element corresponding to the stateless SF to the SF type, and sending the generated SFP and SFP ID to each SFF, and each SFF is itself The service forwarding table is updated, and the service flow is forwarded according to the updated service forwarding table, and the service flow is processed by the corresponding SF instance, that is, the SFC controller performs load balancing control on the stateful SF (SFC). The controller selects a specific SF instance for the SF belonging to the stateful SF according to the load information of each SF instance, and transfers the load balancing control of the stateless SF to the service forwarding device for processing (the SFC controller is not a stateless SF) The SF selects a specific SF instance), so this embodiment effectively reduces the SFC controller according to the service chain service request compared to the prior art. The number of SFPs and corresponding SFP IDs is reduced, which effectively reduces the signaling overhead required for the SFC to configure the SFP for each SFF, and accordingly reduces the service forwarding table entries required for each SFF, saving each SFF. The storage space, and the reduction of forwarding entries in the SFF can improve the forwarding efficiency. According to the technical solution described in the embodiment of the present invention, assuming that there are a total of M stateless SFs in the network, the generated SFP ID is only 1/M of the number of SFP IDs in the prior art, and correspondingly, the required storage in the SFF. The forwarding entry is only 1/M of the number of forwarding entries in the prior art.

下面以一个具体的实施例对上述实施例的 S408中 SFF如何对业务流进行转发的进行具体说明，图 6为本发明业务流处理方法各 SFF与 SF实例的连接举例示意图，此处以业务链服务请求消息中的 SFC 为 SF1— SF2 →SF3作为举例说明， SFC 控制器判断获知 SF1和 SF3为有状态 SF， SF2 为无状态 SF， SFC控制器为该业务链服务请求生成的 SFP为 sf 11→SF2→ sf31 , SFP ID为 1。假设各 SFF与各 SF实例的连接情况如图 6所示，此处仅画出各 SFF和 SF实例的连接情况作示意说明。其中，各 SFF具体为 SFF-A、 SFF-B以及 SFF-C, sfl l和 sf31为 SF实例， SF2为 SF类型，其包括 sf21、 sf22、 sf23和 sf24四个具体实例，本实施例各 SFF所维护的业务转发表具体为表 4，其中， load指 SF实例的负载信息，该负载信息可以从 SFC 控制器获取得到。 In the following, a specific example of how the SFF in the S408 of the foregoing embodiment forwards the service flow is specifically described. FIG. 6 is a schematic diagram of a connection between each SFF and the SF instance in the service flow processing method of the present invention, where the service chain service is used. The SFC in the request message is SF1 - SF2 → SF3 As an example, the SFC controller determines that SF1 and SF3 are stateful SFs, and SF2 is a stateless SF. The SFP controller generates SFPs for the service chain service request as sf 11→SF2→sf31 and SFP ID is 1. Assume that the connection between each SFF and each SF instance is as shown in FIG. 6, and only the connection between each SFF and SF instance is shown here for illustration. Each SFF is specifically SFF-A, SFF-B, and SFF-C, and sfl l and sf31 are SF instances, and SF2 is an SF type, which includes four specific examples of sf21, sf22, sf23, and sf24, and each SFF in this embodiment. The service forwarding table maintained is specifically shown in Table 4, where load refers to the load information of the SF instance, and the load information can be obtained from the SFC controller.

表 4 各 SFF所维护的业务转发表 Table 4 Service forwarding table maintained by each SFF

SFF- A SFP SFF- A SFP

1： sfl l→SF2→sf31 1: sfl l→SF2→sf31

SFF-A FT: sfl l , locator SFF-A FT: sfl l , locator

sf 31 , locator Sf 31 , locator

SF2 sf 21, locator, load SF2 sf 21, locator, load

sf 22, locator, load sf 23, locator, load sf 24, locator, load Sf 22, locator, load sf 23, locator, load sf 24, locator, load

SFF- C SFP SFF- C SFP

1： sfl l→SF2→sf31 1: sfl l→SF2→sf31

SFF-C FT: sf 31 , locator SFF-C FT: sf 31 , locator

SF2 sf 23, locator, load I I I sf 24, locator, load | 在上述实施场景下，各 SFF的具体转发流程如下： SF2 sf 23, locator, load III sf 24, locator, load | In the above implementation scenario, the specific forwarding process of each SFF is as follows:

歩骤 a、分类器根据业务流的 match rule 从匹配表中获取该 match rule对应的 SFP ID, 将该 SFP ID标记到该业务流数据包上，并设置 index 为 0。 Step a: The classifier obtains the SFP ID corresponding to the match rule from the matching table according to the match rule of the service flow, marks the SFP ID to the service flow data packet, and sets the index to 0.

歩骤 b、 SFF0从分类器接收到携带有 SFP ID的业务流数据包之后，根据该 SFP ID获取 SFP的第一跳为 _Sf 11，所以将业务流转发到 sfl l的位置，此时 sfl l的 locator为 SFF-A的 IP地址。 Ho after step b, SFF0 received from the classifier to carry SFP ID traffic stream packets, based on the acquired ID of the first hop SFP SFP is _S f 11, it is sent to the traffic flow sfl position L, in which case sfl The locator of l is the IP address of SFF-A.

歩骤 c、 SFF-A 接收到业务流数据包之后，根据业务流数据包中的 SFP ID以及 index值判断出需要将业务流数据包转发到 sfl l处理，所以 SFF-A将业务流数据包发给 sf l l , 当 sfl l处理完业务流数据包之后 index 会加 1并将业务流数据包发给 SFF-A。 After receiving the service flow data packet, the SFF-A determines that the service flow data packet needs to be forwarded to the sfl1 process according to the SFP ID and the index value in the service flow data packet, so the SFF-A will process the service flow data packet. Send to sf ll. When sfl l processes the service flow packet, index will add 1 and send the service flow packet to SFF-A.

歩骤 d、 SFF-A接收到 sf l l返回的业务流数据包后，根据 SFP ID以及此时 index的值判断出业务流数据包将由 SF2处理，由于 SFF-A业务转发表中记录的 SF2为 SF类型，所以 SFF-A选择一个负载低的 SF2实例，并将业务流数据包发给该 SF实例，假设此处 sf 23为负载最低的 SF实例，此处的 sf23的 locator为 SFF-C的 IP地址。 Step d: After receiving the service flow data packet returned by sf ll, the SFF-A determines that the service flow data packet is processed by the SF2 according to the SFP ID and the value of the index at this time, because the SF2 recorded in the SFF-A service forwarding table is SF type, so SFF-A selects a low-load SF2 instance and sends the service flow data packet to the SF instance. Suppose sf 23 is the lowest load SF instance, where sf23 locator is SFF-C. IP address.

歩骤 e、 SFF-C 接收到业务流数据包之后，根据业务流数据包中的 SFP ID以及 index值判断出需要将业务流数据包转发到 sf23处理，所以 SFF-C将业务流数据包发给 sf 23，当 sf 23处理完业务流数据包之后 index 会再加 1，并将业务流数据包发送给 SFF-C。 After receiving the service flow data packet, the SFF-C determines that the service flow data packet needs to be forwarded to the sf23 processing according to the SFP ID and the index value in the service flow data packet, so the SFF-C sends the service flow data packet. For sf 23, index will be incremented by 1 after sf 23 processes the service flow packet, and the service flow packet is sent to SFF-C.

歩骤 f、 SFF-C接收到 sf23返回的业务数据包后，根据 SFP ID以及此时的 index的值判断出业务流数据包将由 sf31处理，所以 SFF-C将业务流数据包发给 sf31，此处 sf31的 locator为 SFF-B的 IP地址。 Step f: After receiving the service data packet returned by sf23, SFF-C determines that the service flow data packet is processed by sf31 according to the SFP ID and the value of the index at this time, so SFF-C sends the service flow data packet to sf31, Here the locator of sf31 is the IP address of SFF-B.

歩骤 g、 SFF-B 接收到业务流数据包之后，根据业务流数据包中的 SFP ID 以及此时的 index 值判断出需要将业务流数据包转发到 sf31 处理，所以 SFF-B将业务流数据包发给 sf31， sf31处理完业务流数据包后将业务流数据返回给 SFF-B,此时业务流数据包经过所有 SFP中的 SFP元素。 After receiving the service flow data packet, the SFF-B determines that the service flow data packet needs to be forwarded to the sf31 processing according to the SFP ID in the service flow data packet and the index value at this time, so the SFF-B will flow the service flow. The data packet is sent to sf31. After processing the service flow data packet, sf31 returns the service flow data to SFF-B. At this time, the service flow data packet passes through the SFP elements in all SFPs.

由上述歩骤的说明可以得出，本发明中的 SFP中的 SFP元素可能是 SF 类型，对于这些 SFP元素就需要由 SFF来选择具体 SF实例， SFF的转发动作具体可以包括两种方式： It can be concluded from the above description that the SFP element in the SFP in the present invention may be SF. Type, for these SFP elements, you need to select a specific SF instance by SFF. The forwarding action of SFF can specifically include two ways:

方式一、若 SFP元素为 SF类型，则由 SFF来判断该 SF类型对应的 SF 实例，判断方法是根据 SF类型中各 SF实例的负载情况。其中，若 SFF要转发到的 SFP元素与该 SFF相连，则 SFF只需在与其相连的 SF实例中选择一个负载低的 sf 进行转发；若 SFF要转发到的 SFP元素不与该 SFF相连，则 SFF从其维护的所有 SF实例中选择一个负载低的 sf进行转发。 Manner 1: If the SFP element is of the SF type, the SFF determines the SF instance corresponding to the SF type, and the determining method is based on the load condition of each SF instance in the SF type. If the SFP element to which the SFF is to be forwarded is connected to the SFF, the SFF only needs to select a low-load sf for forwarding in the SF instance connected thereto; if the SFP element to which the SFF is to be forwarded is not connected to the SFF, The SFF selects a low-load sf from all the SF instances it maintains for forwarding.

方式二、若 SFP元素为 SF实例，则 SFF按照 SFP中指定的 sf进行转发。 Manner 2: If the SFP element is an SF instance, the SFF is forwarded according to the sf specified in the SFP.

图 7为本发明控制器实施例一的结构示意图，如图 7所示，本实施例的装置可以包括：接收模块 1 1、处理模块 12和发送模块 13，其中，接收模块 1 1 用于接收针对一业务流的业务链服务请求消息，所述业务链服务请求消息包括与所述业务流对应的匹配规则，以及所述业务流需要的业务链 SFC , 所述业务链中包括依序排列的多个网络业务功能 SF，处理模块 12用于根据所述多个 SF分别生成对应的、用于形成与所述 SFC对应的业务链实例 SFP的 SFP元素，并为生成的所述 SFP分配对应的标识 SFP ID; 其中，若判断获知所述多个 SF中包括无状态 SF，则对应的 SFP元素为业务功能类型的元素，发送模块 13用于将所述 SFP以及所述 SFP ID发送给各业务转发设备 SFF , 以供所述 SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理；其中所述 SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理包括：所述 SFF为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流。 FIG. 7 is a schematic structural diagram of Embodiment 1 of the controller of the present invention. As shown in FIG. 7, the apparatus in this embodiment may include: a receiving module 1 1 , a processing module 12 , and a sending module 13 , where the receiving module 1 1 is configured to receive a service chain service request message for a service flow, the service chain service request message includes a matching rule corresponding to the service flow, and a service chain SFC required by the service flow, where the service chain includes sequentially arranged a plurality of network service functions SF, the processing module 12 is configured to generate, according to the plurality of SFs, corresponding SFP elements for forming a service chain instance SFP corresponding to the SFC, and assign corresponding to the generated SFPs. The SFP ID is identified; wherein, if it is determined that the plurality of SFs include a stateless SF, the corresponding SFP element is an element of a service function type, and the sending module 13 is configured to send the SFP and the SFP ID to each service. Forwarding device SFF for the SFF to process the service flow including the SFP ID according to the SFP element; wherein the SFF is based on the SFP element The processing of the service flow including the SFP ID includes: the SFF selecting a network service function instance for the SFP element belonging to the service function type to process the service flow.

可选地，处理模块 12 还用于若判断获知所述多个 SF 中包括有状态 SF, 则选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素。 Optionally, the processing module 12 is further configured to: if it is determined that the plurality of SFs include the state SF, select a network service function instance as the SFP element corresponding to the stateful SF.

进一歩地，所述选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素，具体可以包括：选择一个负载满足预设条件的网络业务功能实例作为所述有状态 SF所对应的 SFP元素。 Further, the selecting a network service function instance as the SFP element corresponding to the stateful SF may include: selecting a network service function instance whose load meets a preset condition as the SFP corresponding to the stateful SF element.

其中，所述选择一个负载满足预设条件的网络业务功能实例具体可以为：选择一个负载小于一阈值的网络业务功能实例；或，选择一个负载满足一业务需求的网络业务功能实例。本实施例的装置，可以用于执行图 1所示方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。 The example of the network service function that selects a load that meets the preset condition may be: selecting a network service function instance whose load is less than a threshold; or selecting a network service function instance that meets a service requirement. The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.

图 8为本发明业务转发设备实施例一的结构示意图，如图 8所示，本实施例的装置可以包括：接收模块 21和处理模块 22，其中，接收模块 21 用于接收控制器发送的业务链实例 SFP和对应的标识 SFP ID , 其中，所述 SFP是由所述控制器根据业务流需要的业务链 SFC生成的，并由所述控制器为生成的所述 SFP分配对应的标识 SFP ID , 所述 SFP 中包括多个 SFP 元素，所述 SFP元素为所述控制器根据所述 SFC中包括的依序排列的多个网络业务功能 SF分别生成的，处理模块 22用于根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理；其中，所述根据所述 SFP元素对所述业务流进行处理包括：为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流。 8 is a schematic structural diagram of Embodiment 1 of a service forwarding device according to the present invention. As shown in FIG. 8, the device in this embodiment may include: a receiving module 21 and a processing module 22, where the receiving module 21 is configured to receive a service sent by the controller. a chain instance SFP and a corresponding identifier SFP ID, wherein the SFP is generated by the controller according to a service chain SFC required by the service flow, and the controller allocates a corresponding identifier SFP ID to the generated SFP. The SFP includes a plurality of SFP elements, and the SFP element is generated by the controller according to the plurality of network service functions SF sequentially arranged in the SFC, and the processing module 22 is configured to use the SFP according to the SFP. The element processes the service flow including the SFP ID, where the processing the service flow according to the SFP element includes: selecting a network service function instance for the SFP element belonging to the service function type to process the business flow.

可选地，处理模块 22还用于将所述业务流发送到 SFP元素所对应的网络业务功能实例进行处理。 Optionally, the processing module 22 is further configured to send the service flow to the network service function instance corresponding to the SFP element for processing.

进一歩地，所述为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流，具体可以包括：为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 Further, the selecting a network service function instance for the SFP element belonging to the service function type to process the service flow may include: selecting a network service function that meets a preset condition for the SFP element belonging to the service function type. An instance to process the traffic flow.

可选的，所述处理模块具体用于：在属于业务功能类型的 SFP元素对应各网络业务功能实例中，为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 Optionally, the processing module is specifically configured to: select, in an instance of the network service function corresponding to the service function type, a network service function instance that meets a preset condition for the SFP element that belongs to the service function type. The business flow.

其中，负载满足预设条件可以为：负载小于一阈值，或者负载满足一业务需求。可以理解的，也可以选择其他条件，此处不以此作为限制。 The load meets the preset condition, and the load may be less than a threshold, or the load meets a service requirement. It can be understood that other conditions can also be selected, and are not limited thereto.

本实施例的装置，可以用于执行图 2所示方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。 The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and the technical effect are similar, and details are not described herein again.

图 9为本发明控制器实施例二的结构示意图，如图 9所示，本实施例提供的控制器 30包括处理器 301和存储器 302。控制器 30还可以包括发射器 303、接收器 304。发射器 303和接收器 304可以和处理器 301相连。其中，发射器 303 用于发送数据或信息，接收器 304 用于接收数据或信息，存储器 302存储执行指令，当控制器 30运行时，处理器 301与存储器 302之间通信，处理器 301调用存储器 302中的执行指令，用于执行如图 1所示方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。 FIG. 9 is a schematic structural diagram of Embodiment 2 of the controller of the present invention. As shown in FIG. 9, the controller 30 provided in this embodiment includes a processor 301 and a memory 302. The controller 30 can also include a transmitter 303, a receiver 304. Transmitter 303 and receiver 304 can be coupled to processor 301. The transmitter 303 is configured to transmit data or information, the receiver 304 is configured to receive data or information, and the memory 302 stores execution instructions. When the controller 30 is running, the processor 301 and the storage The processor 302 calls the execution instruction in the memory 302 to execute the technical solution of the method embodiment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.

图 10为本发明业务转发设备实施例二的结构示意图，如图 10所示，本实施例提供的业务转发设备 40包括处理器 401和存储器 402。业务转发基站设备 40还可以包括发射器 403、接收器 404。发射器 403和接收器 404可以和处理器 401相连。其中，发射器 403用于发送数据或信息，接收器 404 用于接收数据或信息，存储器 402存储执行指令，当业务转发设备 40运行时，处理器 401与存储器 402之间通信，处理器 401调用存储器 402中的执行指令，用于执行如图 2所示方法实施例的技术方案，其实现原理和技术效果类似，此处不再赘述。 FIG. 10 is a schematic structural diagram of Embodiment 2 of a service forwarding device according to the present invention. As shown in FIG. 10, the service forwarding device 40 provided in this embodiment includes a processor 401 and a memory 402. The service forwarding base station device 40 may also include a transmitter 403 and a receiver 404. Transmitter 403 and receiver 404 can be coupled to processor 401. The transmitter 403 is configured to send data or information, the receiver 404 is configured to receive data or information, and the memory 402 stores execution instructions. When the service forwarding device 40 is running, the processor 401 communicates with the memory 402, and the processor 401 calls The execution instructions in the memory 402 are used to perform the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.

在本发明所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。 In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

所述该作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。 The units described as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。 In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器，或者网络设备等) 或处理器（processor) 执行本发明各个实施例所述方法的部分歩骤。而前述的存储介质包括： U盘、移动硬盘、只读存储器（Read-Only Memory, ROM)、随机存取存储器（Random Access Memory, RAM) 、磁碟或者光盘等各种可以存储程序代码的介质。 The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the method of various embodiments of the present invention. Partially. And the foregoing The storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code.

本领域技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。上述描述的装置的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。 A person skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed, that is, the device is installed. The internal structure is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the device described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。 Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

权利要求书 Claim

1、一种业务流的处理方法，其特征在于，包括： A method for processing a service flow, comprising:

接收针对一业务流的业务链服务请求消息，所述业务链服务请求消息包括与所述业务流对应的匹配规则，以及所述业务流需要的业务链 Receiving a service chain service request message for a service flow, the service chain service request message includes a matching rule corresponding to the service flow, and a service chain required by the service flow

SFC , 所述 SFC中包括依序排列的多个网络业务功能 SF; SFC, the SFC includes a plurality of network service functions SF arranged in sequence;

根据所述多个 SF分别生成对应的、用于形成与所述 SFC对应的业务链实例 SFP的 SFP元素，并为生成的所述 SFP分配对应的标识 SFP ID; 其中，若判断获知所述多个 SF中包括无状态 SF，则所述无状态 SF对应的 SFP元素为业务功能类型的元素； Generating, according to the plurality of SFs, a corresponding SFP element for forming a service chain instance SFP corresponding to the SFC, and assigning a corresponding identifier SFP ID to the generated SFP; The SF includes a stateless SF, and the SFP element corresponding to the stateless SF is an element of a service function type;

将所述 SFP以及所述 SFP ID发送给各业务转发设备 SFF , 以供所述 Sending the SFP and the SFP ID to each service forwarding device SFF for the

SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理；其中所述 SFF根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理包括：所述 SFF为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流。 The SFF processes the service flow including the SFP ID according to the SFP element, where the SFF processes the service flow including the SFP ID according to the SFP element, where the SFF belongs to the service function type. The SFP element selects a network service function instance to process the service flow.

2、根据权利要求 1所述的方法，其特征在于，所述根据所述多个 SF 分别生成对应的、用于形成与所述 SFC对应的业务链实例 SFP的 SFP元素，还包括： The method according to claim 1, wherein the generating, by the plurality of SFs, a corresponding SFP element for forming a service chain instance SFP corresponding to the SFC, further comprising:

若判断获知所述多个 SF中包括有状态 SF，则选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素。 If it is determined that the plurality of SFs include the state SF, a network service function instance is selected as the SFP element corresponding to the stateful SF.

3、根据权利要求 2所述的方法，其特征在于，所述 SFF根据所述 SFP 元素对包括有所述 SFP ID的业务流进行处理，还包括： The method according to claim 2, wherein the SFF processes the service flow including the SFP ID according to the SFP element, and further includes:

4、根据权利要求 2或 3所述的方法，其特征在于，所述选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素，包括： The method according to claim 2 or 3, wherein the selecting a network service function instance as the SFP element corresponding to the stateful SF includes:

5、根据权利要求 1所述的方法，其特征在于，所述 SFF为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流，包括：所述 SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 The method according to claim 1, wherein the SFF selects a network service function instance for the SFP element belonging to the service function type to process the service flow, including: The SFF selects a network service function instance whose load satisfies a preset condition for the SFP element belonging to the service function type to process the service flow.

6、根据权利要求 5所述的方法，其特征在于，所述 SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流，包括： The method according to claim 5, wherein the SFF selects a network service function instance whose load satisfies a preset condition for the SFP element of the service function type to process the service flow, including:

在属于业务功能类型的 SFP元素对应各网络业务功能实例中，所述 SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 In the SFP element belonging to the service function type, the SFP element selects a network service function instance whose load meets the preset condition to process the service flow.

7、根据权利要求 6所述的方法，其特征在于，所述 SFF为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流，还包括： The method according to claim 6, wherein the SFF selects a network service function instance whose load meets a preset condition to process the service flow for the SFP element of the service function type, and further includes:

8、根据权利要求 4至 7任一项所述的方法，其特征在于，所述选择一个负载满足预设条件的网络业务功能实例具体为： The method according to any one of claims 4 to 7, wherein the selecting a network service function instance in which a load meets a preset condition is specifically:

9、一种业务流的处理方法，其特征在于，包括： 9. A method for processing a service flow, the method comprising:

接收控制器发送的业务链实例 SFP和对应的标识 SFP ID, 其中，所述 Receiving a service chain instance SFP and a corresponding identifier SFP ID sent by the controller, where

SFP是由所述控制器根据业务流需要的业务链 SFC生成的，并由所述控制器为生成的所述 SFP分配对应的标识 SFP ID , 所述 SFP中包括多个 SFP 元素，所述 SFP元素为所述控制器根据所述 SFC中包括的依序排列的多个网络业务功能 SF分别生成的； The SFP is generated by the controller according to the service chain SFC required by the service flow, and the controller allocates a corresponding identifier SFP ID to the generated SFP, where the SFP includes multiple SFP elements, and the SFP The element is generated by the controller according to a plurality of network service functions SF sequentially arranged in the SFC;

10、根据权利要求 9所述的方法，其特征在于，所述根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理，还包括：将所述业务流发送到 SFP元素所对应的网络业务功能实例进行处理。 The method according to claim 9, wherein the processing, by the SFP element, the service flow including the SFP ID, further includes: The service flow is sent to the network service function instance corresponding to the SFP element for processing.

11、根据权利要求 10所述的方法，其特征在于，所述为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流，包括：为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 The method according to claim 10, wherein the selecting a network service function instance for the SFP element belonging to the service function type to process the service flow comprises: selecting one for the SFP element belonging to the service function type The network service function instance that satisfies the preset condition is loaded to process the service flow.

12、根据权利要求 11所述的方法，其特征在于，所述为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流，包括： The method according to claim 11, wherein the selecting, by the SFP element belonging to the service function type, a network service function instance that meets a preset condition to process the service flow, includes:

13、根据权利要求 11或 12所述的方法，其特征在于，所述选择一个负载满足预设条件的网络业务功能实例具体为： The method according to claim 11 or 12, wherein the selecting a network service function instance in which a load meets a preset condition is specifically:

14、一种控制器，其特征在于，包括： 14. A controller, comprising:

接收模块，用于接收针对一业务流的业务链服务请求消息，所述业务链服务请求消息包括与所述业务流对应的匹配规则，以及所述业务流需要的业务链 SFC, 所述 SFC中包括依序排列的多个网络业务功能 SF; a receiving module, configured to receive a service chain service request message for a service flow, where the service chain service request message includes a matching rule corresponding to the service flow, and a service chain SFC required by the service flow, in the SFC Including a plurality of network service functions SF arranged in sequence;

处理模块，用于根据所述多个 SF分别生成对应的、用于形成与所述 a processing module, configured to generate, according to the multiple SFs, corresponding to,

SFC对应的业务链实例 SFP的 SFP元素，并为生成的所述 SFP分配对应的标识 SFP ID; 其中，若判断获知所述多个 SF中包括无状态 SF，则所述无状态 SF对应的 SFP元素为业务功能类型的元素； An SFP element of the service chain instance SFP corresponding to the SFC, and assigning a corresponding identifier SFP ID to the generated SFP; wherein, if it is determined that the plurality of SFs include a stateless SF, the SFP corresponding to the stateless SF An element is an element of a business function type;

15、根据权利要求 14所述的控制器，其特征在于，所述处理模块还用于：若判断获知所述多个 SF中包括有状态 SF，则选择一网络业务功能实例作为所述有状态 SF所对应的 SFP元素。 The controller according to claim 14, wherein the processing module is further configured to: If it is determined that the plurality of SFs include the state SF, a network service function instance is selected as the SFP element corresponding to the stateful SF.

16、根据权利要求 15所述的控制器，其特征在于，所述处理模块具体用于：选择一个负载满足预设条件的网络业务功能实例作为所述有状态 SF所对应的 SFP元素。 The controller according to claim 15, wherein the processing module is configured to: select a network service function instance whose load meets a preset condition as an SFP element corresponding to the status SF.

17、根据权利要求 16所述的控制器，其特征在于，所述选择一个负载满足预设条件的网络业务功能实例具体为： The controller according to claim 16, wherein the example of selecting a network service function that satisfies a preset condition is:

18、一种业务转发设备，其特征在于，包括： 18. A service forwarding device, comprising:

接收模块，用于接收控制器发送的业务链实例 SFP和对应的标识 SFP ID, 其中，所述 SFP是由所述控制器根据业务流需要的业务链 SFC生成的，并由所述控制器为生成的所述 SFP分配对应的标识 SFP ID, 所述 SFP 中包括多个 SFP元素，所述 SFP元素为所述控制器根据所述 SFC中包括的依序排列的多个网络业务功能 SF分别生成的； a receiving module, configured to receive a service chain instance SFP and a corresponding identifier SFP ID sent by the controller, where the SFP is generated by the controller according to a service chain SFC required by the service flow, and is configured by the controller And generating, by the SFP, a corresponding SFP ID, where the SFP includes a plurality of SFP elements, where the SFP element is generated by the controller according to the plurality of network service functions SF sequentially arranged in the SFC. of;

处理模块，用于根据所述 SFP元素对包括有所述 SFP ID的业务流进行处理；其中，所述根据所述 SFP元素对所述业务流进行处理包括：为属于业务功能类型的 SFP元素选择一个网络业务功能实例来处理所述业务流。 a processing module, configured to process, according to the SFP element, a service flow that includes the SFP ID, where the processing, according to the SFP element, processing the service flow, includes: selecting, for an SFP element that belongs to a service function type An instance of a network service function to process the traffic flow.

19、根据权利要求 18所述的业务转发设备，其特征在于，所述处理模块还用于： The service forwarding device according to claim 18, wherein the processing module is further configured to:

将所述业务流发送到 SFP元素所对应的网络业务功能实例进行处理。 The service flow is sent to the network service function instance corresponding to the SFP element for processing.

20、根据权利要求 19所述的业务转发设备，其特征在于，所述处理模块具体用于： The service forwarding device according to claim 19, wherein the processing module is specifically configured to:

21、根据权利要求 20所述的业务转发设备，其特征在于，所述处理模块具体用于： The service forwarding device according to claim 20, wherein the processing module is specifically configured to:

在属于业务功能类型的 SFP元素对应各网络业务功能实例中，为属于业务功能类型的 SFP元素选择一个负载满足预设条件的网络业务功能实例来处理所述业务流。 In the network service function instance corresponding to the service function type SFP element, select a network service function instance that meets the preset condition for the SFP element belonging to the service function type. To process the business flow.

22、根据权利要求 20或 21所述的业务转发设备，其特征在于，所述选择一个负载满足预设条件的网络业务功能实例具体为： The service forwarding device according to claim 20 or 21, wherein the example of selecting a network service function that meets a preset condition is:

23、一种控制器，其特征在于，包括： 23. A controller, comprising:

处理器和存储器，所述存储器存储执行指令，当所述控制器运行时，所述处理器与所述存储器之间通信，所述处理器执行所述执行指令使得所述控制器执行如权利要求 1至 8任一项所述的方法。 a processor and a memory, the memory storing execution instructions, when the controller is running, the processor is in communication with the memory, the processor executing the execution instruction such that the controller performs the claim The method of any of 1 to 8.

24、一种业务转发设备，其特征在于，包括： 24. A service forwarding device, comprising:

处理器和存储器，所述存储器存储执行指令，当所述业务转发设备运行时，所述处理器与所述存储器之间通信，所述处理器执行所述执行指令使得所述业务转发设备执行如权利要求 9至 13任一项所述的方法。 a processor and a memory, the memory storing execution instructions, when the service forwarding device is in operation, the processor is in communication with the memory, the processor executing the execution instruction to cause the service forwarding device to perform The method of any one of claims 9 to 13.